Autotrack : Automatic and enhanced Google Analytics tracking for common user interactions on the web.
Ember.js : A JavaScript framework for creating ambitious web applications
Band.js : An interface for the Web Audio API that supports rhythms, multiple instruments, repeating sections, and complex time signatures.
Zepto.js : Zepto is a minimalist JavaScript library for modern browsers with a largely jQuery-compatible API. If you use jQuery, you already know how to use Zept...
rsvp.js : A lightweight library that provides tools for organizing asynchronous code
EnhanceJS is a new Javascript framework designed to improve the application of Progressive Enhancement by first testing browser capabilities for key Javascript and CSS support before applying advanced styles and scripts to the page.